Fact of the Day - August 17 Aug 17, 2024 4:09:15 GMT -6 Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by NerdiestKen on Aug 17, 2024 4:09:15 GMT -6 Moonflowers unfurl in the evening and stay open until the sun rises. Several varieties of moonflower also give off a lemon fragrance when its flowers are open.